Cup sleeve



FIG. 1 is a front, top, and right side perspective view of a cup sleeve, showing the claimed design;

FIG. 2 is a front view thereof and a back view thereof is identical;

FIG. 3 is a left side view thereof and a right side view thereof is identical;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is another front, top, and right side perspective view thereof;

FIG. 7 is a perspective view thereof showing the cup sleeve in a partially folded configuration; and,

FIG. 8 is a perspective view thereof showing the cup sleeve in a folded configuration. 

CLAIM The ornamental design for a cup sleeve, as shown and described. 